Optical Relay System for Multi-Band Signal Combination
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Solution Overview
Problem
Existing optical relay systems require multiple filters to combine signals from multiple frequency bands, which can lead to incorrect connections and signal damage when bands overlap, limiting their ability to efficiently transmit signals to shadow areas.
Innovation Solution
An optical relay system that uses a base station interface unit with a main combination/division unit (MCDU) to combine and divide RF signals using combiners and dividers, eliminating the need for multiple filters and allowing for efficient band combination and transmission even when signals overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple filters are used to combine signals of multiple frequency bands, then signal combination capability is improved, but device complexity and connection error risk increase
Solution Approach 1:
The patent combines multiple filter functions into a single filter unit that can handle multiple frequency bands simultaneously. Instead of using separate filters for each frequency band, the invention integrates them into one unified filter structure that performs band combination functionality, thereby reducing the total number of components while maintaining signal combination capability.
Solution Approach 2:
The filter unit is designed with multi-functionality to handle multiple frequency bands through a single component. This universal filter can process different frequency bands (such as 700MHz, 800MHz, 900MHz, 1800MHz, 2100MHz, and 2600MHz) without requiring separate dedicated filters for each band, thus simplifying the overall system architecture.
2Reliability
If filters are accurately connected to each frequency module, then signal integrity is maintained, but ease of operation and installation become difficult
Solution Approach 1:
The system is segmented into functional modules where each frequency module connects to the unified filter unit through standardized interfaces. This modular segmentation allows for easier installation and maintenance while maintaining signal integrity, as each module can be independently connected without requiring complex wiring configurations.
Solution Approach 2:
The unified filter unit acts as an intermediary component that receives signals from multiple frequency modules and processes them centrally. This intermediary structure simplifies connections by providing a single point of interface for all frequency bands, reducing the complexity of accurate connections compared to direct point-to-point filtering.
3Measurement precision
If filters are used for band combination, then frequency separation is achieved, but adaptability to overlapping bands is reduced
Solution Approach 1:
The filter unit is designed with dynamic characteristics that allow it to adapt to different frequency band configurations, including overlapping bands. The filter can dynamically adjust its response to handle various band combinations and overlapping scenarios, providing both precise frequency separation when needed and flexibility for overlapping band operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient combination and transmission of multiple band-limited signals without damaging original signals, improving user convenience and reducing the complexity of signal processing, while supporting various mobile communication standards and protocols.
Implementation Method 1
the optical distribution unit configured to convert the RF signals received from the base station interface unit into optical signals and transmit the optical signals to at least one optical unit
Implementation Method 2
the optical unit configured to convert the optical signals received from the optical distribution unit into RF signals and output the RF signals to a mobile terminal
Data Source
AI summary
The present invention relates to an optical relay system for transmitting multi-band frequency signals with limited bands by using optical lines. According to the present invention, a plurality of band-limited signals are band-combined into one signal by using a combiner, and the signals are transmitted through multiple outputs by using a distributor, and thus a multi-stage filter is not necessary. In addition, the present invention is capable of effectively solving various problems such as damage to the original signals caused by the band combination of the multi-stage filter, and there is no need to precisely connect each of the band-limited signals to the determined ports of the combiner and the signals can be connected to random ports, thereby improving convenience of use.